Take-up mechanism for knitting-machines



K. HOWIE. TAKE-UP MECHANISM FOR KNITTING MACHINES.

APPLICATION FILED MAR. 3. 1919- Patented Dec. 6, 1921.

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UNITED STATES} KENNETH HOWIE, .OF PHILADELPHIA, PENNSYLVANIA,

PATENT OF FICE'.

ASSIGN' OR TO VJILDMAN VANIA.

TAKE-UP IYIEU Application filed March 3, 1919.

T alle e-710m it may concern Be it known that I, KENNETH Howie, a citizen of the United States, and resident of Philadelphia, Pennsylvania, have invented certain new and useful Improvements in 'iake-Up Mechanism for Knitting-Machines, of which the following is a specification.

My invention is an improvement upon that form of takeup mechanism disclosed in Lettcrs Patent of the United States granted to Vildman Mfg. Company, No. 940,656, N0- vember 23rd, 1909, as assignee of G. L. Ballard. e

The present invention consists in the features and combination and arrangement of parts hereinafter describedand particularly pointed out in the claims.

In the accompanying drawing:

Figure l is a side elevation of takeup mechanism embodying my invention.

F ig. 2 is a. front view of one of the hangers with the takeup roll in place illustrating the driving mechanism, and my present attachment. V I

Fig. 3 is a sectional view through the weight and lever.

Fig. 4 is a front view the invention.

In these drawings thetakeup rolls 1, 1, are journaled in arms 8, which are fixed by set screws to the rod, or shaft 5, journaled in standards, of a main or rotary frame one of which is shown at 6. These arms constitute a movable support for the take-up rolls. One of the takeup rolls carries a worm wheel ll) driven from a worm 9, the latter being driven through friction members 20, 22, associated with the shaft 17. The shaft 17 is driven from the takeup ring in the usual manner through a gear wheel 17*. One of the arms of the pivoted frame 3 which carries the takeup rolls and is connected to the cross-shaft 5 is connected by a link 11 with a lever 12 pivoted to a bracket 18 at 13, said bracket being fixed to the hanger or standard 6. This lever carries a screw 15 bearing on the rod 16, which has a key 18 extending through slots in the hub of the upper friction drive member 20 and through this keydownward pre sure is exerted on the friction member 20, and this pressure is transmitted to the friction clutch disks between the upper member 20 and the lower member 22, and as the latter is connected with the worm 9 the said of another form of Specification of Letters Patent.

KN LTTING-MACHIN ES.

7 Patented Dec. 6,1921, .Serial No.280,395. I

worm will be driven more or less according a the pressure increases or diminishes at the clutch disks. In'the patent above referred to e 51311115 12' is shown for pressing the lever 12 dewnwardly, this spring being adjustable as to pressure by means of a screw 23, so that the operator is enabled to change the stress to which the parts are subjected to set the apparatus for different grades of yarn or different degrees of tension on the fabric, it being noted that the pressure of th X was in the same direction acted upon the takeup, frame 3 with its take up roll.

While the spring just mentioned provided an operative construction there are objections to use of a spring in connection with a takeu'p' mechanism for a i owing to changes in temperature affecting the stress under which by said spring and it has been found that a spring does not act with the required degree of sensitiveness and responsiveness Whenl the machine is'startedgup after a period of rest. i H

In carrying out my present improvement I employ beam carrying an adjustable weight after the manner of a scale beam. This beam is indicated at a pivoted at b to a lugc built onto or formed with the bracket or main rotary frame 6, the loweredge ofthe beam near its pivotal ooint resting u )OII the boss (Z forming a part of the pivote frame in which the takeup rolls are mounted. This boss be provided with a portion 6 of slightly reduced diameter upon which the sale beam'rests. This scale beam extends llel with the takeup rolls and lies comparatively close to the front takeup roll, so that the-weight shown at ,f carried by the beam will be located near the vertical axial center of the machine about which the takeup'mechanism rotates and thus the scale beam, together with the weight will not tend in any material measure to throw the revolving parts out of balance and it will not be subjected to an undesirable degree to the action of centrifugal force. The scale beam may be graduated as indicated and the weight is adjustable along this beam and may be held in adjustable position by the screw 9 passing through the weight member and having its end bearing in a groove in the scale beam. By adjusting the weight along running for some time or for a period more or less extended.

' knitting head, it may the beam differentdegrees of stress can be applied to the movable takeup frame to suit the conditions of the work being done, as for instance, different grades of yarn or different degrees of tension as may be desiredon the fabric.

This scale beam and weight mechanism will not be subject to because of changes in temperature and will immediately respond to any position of adjustment whether the machine has been has been at rest usting variation it While I have shown the improvement in connection with a takeup of the revolving type, that is one which revolves with the be employed with a takeup of-a fixed character or in other words one which does not revolve.

The construction lends itself to "preserving acompact form of takeup mechanism and an adjustment which readily is accessible by the operator. J

Referring to the multiple disk friction clutch it will be noticed that one set of friction disks is of'fiberand the other set of steel, and these are marked respectivelyv 24 and 25. v v

The fiber "disks are connected with the upper member of the friction and the, steel disks are connected with the worm member.

In order to prevent oil from getting to the within the lower clutch member, 3 latter hasa' steel and fiber disks a shield is provided'at 26, forming an extension of the upper friction clutch member '20 and reaching down which rim or flange 27 reaching to near'the under side of the upper member 20. This depending shield will prevent the oil from reachingthe clutch disks.

Asshown inFig. 4A, the weight instead of being movable for adjusting the tension, is maintained atone point as near to the axial center of the machine as possible. The weight f is therefore fixed at the end of the lever or beam 0 which like the beam a is pivoted to a boss at c. p i The bearing upon which this lever or beam rests, instead of being fixed as in the form first described, is shiftable. This bearing consists of a roller d on 'a block or bracket d adjustably mounted on the graduated rod j. This'rod extends parallel with the takeuprolls and is fixed to arms 3 of the takeup frame which, as above described, pivots about the axis of the rod or shaft 5.

Byv adjusting this hearing along under the to 56 pounds,

the advantages of the weightfurther pointed out that the use of a spring is undesirable in combination with clutch employing members, 7 which are affected by atmospheric, conditions. j v

If the atmosphere is damp the fiber absorbs moisture, particularly when the machine is idle for any length of time, as over night. 'The swelling of the fiber of course requires that "the ta-keup frame must lift higher in order to release the higher the takeupframe-has to go inorder to releasethe clutch the more the spring will be compressed and consequently the greater will bethe reaction ofthe spring upon the takeup frame and the pull of the frame upon the fabric. As an example say that the expansion in the clutch is an eightieth of an inch dueito absorbing moisture,'the extra compression of. the spring is such as fiber washers,

clutch. The

pull of the takeup frame from 32 pounds which of course is objectionable. With the weight arrangement, however, it-makes no differencehow high the takeup frame has to lift in order to release the clutch, because the 'gravitating action of the weight is always-the same, not being affected by the expansion or contraction of the clutch members.

What I claim is:

1. In combination in a takeup for knitting 7 machines, a pair of takeup rolls, amovable support therefor, driving means for the takeup rolls including a clutch, a connection from the movable takeup support for controlling the clutch and adjustable gravitating means for exertin pressure to vary the driving action of the c utch according to the demands of the work, said adjustable gravitating means including a weight, a pivotally mounted beam carrying the wei ht and exerting pressure upon the 'movzi lole takeup support and through it upon the driving clutch, said beam extending in a plane substantially parallel with the takeup rolls. Y

2. In combination in a takeup for knitting-machines, a rotary frame to rotate with the circle of needles, a pair of takeup rolls, a support therefor pivotally mounted in said rotary frame, takeup rolls "including a clutch, a connection controlling the latter'and means for applying varying pressures comprising a weighted beam pivotally mounted and extending parallel with the takeup rolls, and means of ad justment for varying the gravitating force of the weight on the takeup frame, substantially as described.

3. In combination in atakeup mechanism for knittingmachines, a revolving frame, to rotate with the circle of needles, takeup rolls, a support therefor movably mounted in the revolving frame, a clutch for driving drlving means for the 7 the takeup rolls, a connection between the a roll support and the clutch and ad- JllStzllJlG gravitating means carried by the l frame and ex rting its force upon ble roll support, said gravitating means being maintained at substantially the same position relative to the axis oi rotation of the revolving frame under all adjustments of said gravitating means, substantially as described.

l. n combination in a takeup mechanism for knitting machines, a revolving frame, to rotate with the needle circle takeup rolls, a oport therefor movably mounted in the frame, a clutch for driving the eup rolls, a connection between the movable roll support and the clutch and adjustable gravitating means carried by the re volving frame and exerting its force upon the movable roll support, said gravitating means comprising a weighted beam pivoted to the revolving frame, extending substantially parallel with the takeup rolls, and an adjustable bearing on the movable roll support on which the beam rests, substantially as described.

In combination in takeup mechanism for knitting machines, a frame, takeup rolls, a movable support therefor mounted in the frame, connections for driving the taken rolls, including a clutch, a connection between the movable roll support and the clutch for varying the driving capacity the latter, a weighted beam pivoted to the frame and extending in a plane substantially parallel with the takeup rolls, a rod carried by the movable roll support and a bearing adjustable along said rod and engaged by the weighted beam, whereby the gravitating force of said beam exerted upon the movable support may be varied to vary the driving capacity of the clutch, substantially as described.

In testimony whereof, I afiix my signature.

KENNETH HOWIE. 

